Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
IPC Subgroup
C04B 35/03

based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite

Introduced: January 1995

Last revised: January 2006

Full Title

Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products > based on oxides > based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite

Classification Context

Section:
CHEMISTRY; METALLURGY
Class:
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
Subclass:
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE

4 direct subcodes

Child Classifications

Navigate with arrow keys, Enter to open

  • C04B 35/035 Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon
  • C04B 35/057 based on calcium oxide
  • C04B 35/06 based on oxide mixtures derived from dolomite

Top Applicants

Top 10 applicants by patent filingsfor class C04, 2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 2,095
  2. WUHAN UNIVERSITY OF TECHNOLOGY 1,205
  3. NGK INSULATORS JP 1,133
  4. HALLIBURTON ENERGY SERVICES GROUP US 1,049
  5. SIKA TECHNOLOGY CH 1,041
  6. GUILIN UNIVERSITY OF TECHNOLOGY 807
  7. WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY 806
  8. SOUTHEAST UNIVERSITY 801
  9. CORNING US 777
  10. UNITED STATES GYPSUM COMPANY US 739